Improvement in rotary engines



te vv,

@este eine JAMES GOSTANTINE, OF MANSFIELD, LOUISIANA.

Letters Patent No. 109,179, dated November 15, 1870.

IMPRQVEMENT IN ROTARY ENGINES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom. it may concern Bc it known that I J 'AMES Ooxsranfrnsn, ofMansfield, in the parish of De Soto and State of Louisiana, haveinvented a new and useful Improvement in Steam-Engines; and I do herebydeclare that the following is 'a full, clear, and exact descriptionthereof, whichwill enable others skilled in the artto make and use thesame, reference being had to the accomf panying drawing forming part ofthis specification.

My invention relates to' devices for exhausting the steanidi'om rotaryengines, and consists in diminishing the extra frictionb'y exhaustingthrough theA hub, as hereinafter described.

I \\"ill\now,describe a machine with which my improvement is preferablycombined.

Figure 1 is a `sectional elevation, taken on the line x a: of iig. 2,and l v Figure 2 is a horizontal section on thc line y y of (ig. 1.

A is the cylinder;

l, the piston and Gis the shaft.

E and F are the cut-oli` plates, working through opposite sides of thecylinder throgh vstuffing-boxes.

Gis a shell, attached to one end of thel cylinder, forming a steamchest,H, to which the st eatn is admitted through thc pipc-connectionl.

From this chest it passes into the end of the shaft, which is inadchollow fora short distance at K, thence it passes into the cylinderthrough the `piston, at L, bchindit.

' The plates E and F are so `operated as to open in advance of the'piston and close behind it, each clos'- ing before the other begins toopen.

M is the exhaust-passage leading from the front of the piston into ahollow boss, N, on the shaft opening into an annular space, 0, inV oneof the side walls of the case loading to the exhaust-pipe I.

F, which commences to rise as soon as E hasclosed down. .After passingthe plate, and for a quarter of a revolution thereafter, the steam willcontinue to act against the plate E, when F will have again closed`down, and E will begin to rise.

For operating these plates they are connected by bars (l), to slidingbars R, arranged in radial ways in the side of the case, the said slidesbeing Worked by the cam-plate S on the shaft C, the said plate beingprovided with a groove, T, in which studs, projecting from the slidesIt'into the -said groove, work. Half of this `groove .is a semieircle,'concentric with the shaft at V, andthe other half is suitably formed toopen and close the plates while the plate makes half a revolution.

Other means for-.operating these-.plates may be used. The said platesmay also be arranged to work through one end of the cylinder in linesparallel with the shaft, but I preferthe arrangement which I have hereshown. v Y

Having thus described my invention,

I claim as new4 and desire to secure by Letters Patent--A .lhe piston BL, and cut-off plates E F, combined with chambered boss N, annular spaceO, channel K,

and chamber H, combined, constructed, and relatively arranged as and forthe purpose described. v

The above specificationA` of my invention signed by me this 8th day ofApril, 1870. JAMES GONSTANTIN E. Witnesses:

GEO. W. MABEE, ALEX. F. ROBERTS.

